Friction-brake.



A. E. STANBURY.

FRICTION BRAKE.

APPLICATION FILED AUG-30. 1915.

Patented Oct. 24, 1916.

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FRICTION-BRAKE.

Application filed August 30, 1915.

[u all whom it may concern:

Be it known that I, ALBERT E. STANBURY, a citizen of the United States of America, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Friction-Brakes, of which the following is a specification.

The present invention relates to an improved friction brake which. is especially designed for use in connection with the assembler slide of a linotype machine, although it will of course be understood that the device is applicable for use with other analogous machines. When assembling the matrices in a machine of this class to make up a set, it is frequently found that they have become transposed, and for this reason close attention of the operator is required in watching the as embly of the matrices to prevent this trouble. In many cases this trouble is caused by too great movement of the sliding assembler which as a consequence permits the last matrix or mat. to fall away from the set, against the star wheel, thus leaving an opening for the next matrix to fall into between two matrices, instead of falling in between the last matrix and the star wheel.

The object of my invention is to overcome and eliminate this difficulty bv providing a friction braking device by which the assembler slide is stabilized and permitted to move only when required, and only to the extent required.

My invention consists in certain novel combinations and arrangements of parts for braking or retarding the movement of the assembly slide, and releasing said brake as will be hereinafter more specifically pointed out. i

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention, constructed and applied to the assembly slide of the linotype machine, according to the best mode I have so far devised for the practical application of the principles of the invention.

Figure 1 is a view in front elevation showing so much of a linotype machine, parts being dotted, as is necessary to illustrate the application thereto of my braking device. Fig. 2 is an enlarged front elevation of the brake device. Fig. 3 is a side view of the device of Fig. 2 showing also the as- Specification of Letters Patent.

' 1 in Fig.

Patented (let. an, iaio.

Serial No. 47,919.

sembler slide in cross section. Fig. 4 isa sectional detail view at line A-A Fig. 2 showing the spring tension adjusting devices, for the brake. Fig. 5 is a transverse sectional view at line BB Fig. 2 illustrating the assembly slide and its retaining or guide lugs on the bracket by which the device is attached to the linotype machine.

In order that the invention and tion may be clearly understood, it should be noted that the assembly slide or slotted bar 1 is properly supported on the frame of the machine and movable to the left against the tension of the spring 2 which is connected to the end of the slide by the link 3, and this spring tends to pull the slide to the right at all times. The slide is fashioned at its left end with an integral finger or lug 4: against which the matrices 5, 5, (dotted lines) slide into position from the chute indicated by the curved dotted lines 6. The star wheel 7 revolves very rapidly in the direction of the arrow, and it will be seen that as the matrices are fed continuously and consecutively against the preceding matrices supported in standing position by the finger, as in a row, the addition of each matrix moves the slide which carries the growing set, to the left, until finally the set is completed and the elevator 8 rises and lifts the completed set from the slide and the spring 2 then pulls the slide again to the right in position to receive another set. Now it is apparent that the slide, with the addition of each succeeding matrix, must move uniformly and in a stable manner the exact distance and be there held so that the last matrix may not fall over accidentally against the star wheel, and yet prevent the spring 2 from pulling the last matrix, through the slide, over against the star wheel where it might be marred. This condition is accomplished by the utilization of my brake 9 and its head 10, the latter being held in frictional contact with the upper surface of the assembly slide 1.

The brake 9 is a metallic piece or member provided with an offset fiat tongue 10 which passes through an opening in a guide lug 11 integral with the attaching bracket 12. The metallic bracket 12 is attached, as by screws in openings 13, 13, to the frame of the linotype machine, with the retaining or guide lugs 1 1 15 embracing the slide 1, but leaving the slide free to reciprocate within the lugs,

its operaandv without coming in frictional contact with body of the brake 9. The brake head which engages frictionally against the slide, is made of fiber so that its grip may not be afiected by the presence of grease or oil on the slide, and also to prevent scratching or Wearing of the metal slide 1. The

head is attached to the brake member by screws 16, and it may readily be replaced by a new one when worn. The tension of the brake head on the slide may be adjusted by means of the guide rod 17 fixed in the brake result that the slide is held rigid unless the friction between the head and slide is overcome, in which case the movement of the slide is retarded and stabilized.

A release lever 22 pivoted at 23 on the bracket is provided to engage against the end of the tongue 10 and it will be seen that this release lever can be operated to lift the brake 9 so that the block or head 10 is freed from the slide, against the tension Copies of this patent may be obtained for of the spring 18. The release lever may be actuated by hand, but it is also actuated. by an .actuating lever 24, shown in dotted lines Fig. 1, when the end of said actuating lever is engaged by the lug 25 on the elevator 8. Thus when the set of matrices is completed and the elevator rises to free the set from the finger of the slide, the lug 25 encounters the actuating lever, which operates the release lever and brake so that the spring 2 may pull the slide freely to the right in position to receive another set.

From this description taken in connection with my drawings it is evident that I have provided an economical and effective device for accomplishing the purposes and objects of my invention.

What I claim is The combination with a reciprocable slide member and a fixed bracket, of a spring pressed plunger supported in the bracket and formed with a brake head to retard the movement of the slide member, means for adjusting the pressure of the spring pressed plunger, a guide tongue rigid with the plunger and a guide lug for the tongue, and an operating lever engaging said tongue adapted to release the brake head from the slide member.

In testimony whereof I aliix my signature.

ALBERT E. STANBURY.

five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

